Display screen with a user interface



FIG. 1 is a front view of a display screen with a user interface showing the new design; and,

FIG. 2 is another view of a display screen with a user interface showing the new design.

Illustrations in broken line form no part of the claimed design. The outer edge of the portion of the display screen is understood to be congruent with the outer edge of the graphical user interface. 

CLAIM The ornamental design for a display screen with a user interface, as shown and described. 